Opinions from E. L. Packard 1922
- 'Alaria belongs to Aporrhaidae'
- 'Alaria nodosa belongs to Alaria'
- 'Amauropsis belongs to Naticidae'
- 'Amauropsis pseudoalveata belongs to Amauropsis'
- 'Aporrhais vetus belongs to Aporrhais'
- 'Astarte belongs to Astartidae'
- 'Astarte lapidis belongs to Astarte'
- 'Astarte ovoides belongs to Astarte'
- 'Astarte sulcata belongs to Astarte'
- 'Bullaria tumida belongs to Bullaria'
- 'Cardium belongs to Cardiidae'
- 'Cardium coronaensis belongs to Cardium'
- 'Cerithium belongs to Cerithiidae'
- 'Cerithium suciaensis belongs to Cerithium'
- 'Cucullaea belongs to Parallelodontidae'
- 'Cucullaea cordiformis belongs to Cucullaea'
- 'Cucullaea lirata belongs to Cucullaea'
- 'Cucullaea ponderosa belongs to Cucullaea' according to Whiteaves 1876
- 'Cucullaea ponderosa belongs to Cucullaea'
- 'Cucullaea truncata belongs to Cucullaea'
- 'Exogyra californica belongs to Exogyra'
- 'Exogyra inornata belongs to Exogyra'
- 'Gyrodes californica belongs to Gyrodes'
- 'Homomya belongs to Pholadomyacidae'
- 'Homomya hardingensis belongs to Homomya'
- 'Lima belongs to Limidae'
- 'Lima subnodosa belongs to Lima'
- 'Limopsis belongs to Limopsidae'
- 'Limopsis silveradoensis belongs to Limopsis'
- 'Lysis belongs to Thaididae'
- 'Lysis californiensis belongs to Lysis'
- 'Meretrix belongs to Veneridae'
- 'Meretrix angulata belongs to Meretrix'
- 'Meretrix arata belongs to Meretrix' according to Packard 1916
- 'Meretrix nitida belongs to Meretrix'
- 'Meretrix nitida major belongs to Meretrix nitida'
- 'Odostomia belongs to Pyramidellidae'
- 'Odostomia santana belongs to Odostomia'
- 'Ostrea belongs to Ostreidae'
- 'Ostrea crescentica belongs to Ostrea'
- 'Ostrea taxidonta belongs to Ostrea'
- 'Panope belongs to Saxicavidae'
- 'Panope californica belongs to Panope'
- 'Parallelodontidae belongs to Pelecypoda'
- 'Pyramidellidae belongs to Gastropoda'
- 'Siliqua belongs to Solenidae'
- 'Siliqua alisoensis belongs to Siliqua'
- 'Siphonalia belongs to Buccinidae'
- 'Siphonalia dubius belongs to Siphonalia'
- 'Spondylus rugosus belongs to Spondylus'
- 'Tellina belongs to Tellinidae'
- 'Tellina alisoensis belongs to Tellina'
- 'Tellina santana belongs to Tellina'
- 'Trigonarca californica belongs to Trigonarca'
- 'Trigonarca excavata belongs to Trigonarca'
- 'Trigonarca sectilis belongs to Trigonarca'
- 'Volutoderma belongs to Volutidae'
- 'Volutoderma magna belongs to Volutoderma'
- 'Volutoderma santana belongs to Volutoderma'